package org.spbu.plweb.diagram.edit.policies;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.diagram.ui.commands.DeferredLayoutCommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.commands.SetViewMutabilityCommand;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.CanonicalEditPolicy;
import org.eclipse.gmf.runtime.diagram.ui.requests.CreateViewRequest;
import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.gmf.runtime.notation.View;
import org.spbu.plweb.diagram.part.PlwebDiagramUpdater;
import org.spbu.plweb.diagram.part.PlwebNodeDescriptor;
import org.spbu.plweb.diagram.part.PlwebVisualIDRegistry;

/**
 * @generated
 */
public class SiteViewTopicSiteViewCompartmentCanonicalEditPolicy extends
		CanonicalEditPolicy {

	/**
	 * @generated
	 */
	protected void refreshOnActivate() {
		// Need to activate editpart children before invoking the canonical refresh for EditParts to add event listeners
		List<?> c = getHost().getChildren();
		for (int i = 0; i < c.size(); i++) {
			((EditPart) c.get(i)).activate();
		}
		super.refreshOnActivate();
	}

	/**
	 * @generated
	 */
	@SuppressWarnings("rawtypes")
	protected List getSemanticChildrenList() {
		return Collections.EMPTY_LIST;
	}

	/**
	 * @generated
	 */
	protected boolean isOrphaned(Collection<EObject> semanticChildren,
			final View view) {
		return isMyDiagramElement(view)
				&& !semanticChildren.contains(view.getElement());
	}

	/**
	 * @generated
	 */
	private boolean isMyDiagramElement(View view) {
		return false;
	}

	/**
	 * @generated
	 */
	protected void refreshSemantic() {
//		if (resolveSemanticElement() == null) {
//			return;
//		}
//		LinkedList<IAdaptable> createdViews = new LinkedList<IAdaptable>();
//		List<PlwebNodeDescriptor> childDescriptors = PlwebDiagramUpdater
//				.getSiteViewTopicSiteViewCompartment_7001SemanticChildren((View) getHost()
//						.getModel());
//		LinkedList<View> orphaned = new LinkedList<View>();
//		// we care to check only views we recognize as ours
//		LinkedList<View> knownViewChildren = new LinkedList<View>();
//		for (View v : getViewChildren()) {
//			if (isMyDiagramElement(v)) {
//				knownViewChildren.add(v);
//			}
//		}
//		// alternative to #cleanCanonicalSemanticChildren(getViewChildren(), semanticChildren)
//		//
//		// iteration happens over list of desired semantic elements, trying to find best matching View, while original CEP
//		// iterates views, potentially losing view (size/bounds) information - i.e. if there are few views to reference same EObject, only last one 
//		// to answer isOrphaned == true will be used for the domain element representation, see #cleanCanonicalSemanticChildren()
//		for (Iterator<PlwebNodeDescriptor> descriptorsIterator = childDescriptors
//				.iterator(); descriptorsIterator.hasNext();) {
//			PlwebNodeDescriptor next = descriptorsIterator.next();
//			String hint = PlwebVisualIDRegistry.getType(next.getVisualID());
//			LinkedList<View> perfectMatch = new LinkedList<View>(); // both semanticElement and hint match that of NodeDescriptor
//			for (View childView : getViewChildren()) {
//				EObject semanticElement = childView.getElement();
//				if (next.getModelElement().equals(semanticElement)) {
//					if (hint.equals(childView.getType())) {
//						perfectMatch.add(childView);
//						// actually, can stop iteration over view children here, but
//						// may want to use not the first view but last one as a 'real' match (the way original CEP does
//						// with its trick with viewToSemanticMap inside #cleanCanonicalSemanticChildren
//					}
//				}
//			}
//			if (perfectMatch.size() > 0) {
//				descriptorsIterator.remove(); // precise match found no need to create anything for the NodeDescriptor
//				// use only one view (first or last?), keep rest as orphaned for further consideration
//				knownViewChildren.remove(perfectMatch.getFirst());
//			}
//		}
//		// those left in knownViewChildren are subject to removal - they are our diagram elements we didn't find match to,
//		// or those we have potential matches to, and thus need to be recreated, preserving size/location information.
//		orphaned.addAll(knownViewChildren);
//		//
//		ArrayList<CreateViewRequest.ViewDescriptor> viewDescriptors = new ArrayList<CreateViewRequest.ViewDescriptor>(
//				childDescriptors.size());
//		for (PlwebNodeDescriptor next : childDescriptors) {
//			String hint = PlwebVisualIDRegistry.getType(next.getVisualID());
//			IAdaptable elementAdapter = new CanonicalElementAdapter(
//					next.getModelElement(), hint);
//			CreateViewRequest.ViewDescriptor descriptor = new CreateViewRequest.ViewDescriptor(
//					elementAdapter, Node.class, hint, ViewUtil.APPEND, false,
//					host().getDiagramPreferencesHint());
//			viewDescriptors.add(descriptor);
//		}
//
//		boolean changed = deleteViews(orphaned.iterator());
//		//
//		CreateViewRequest request = getCreateViewRequest(viewDescriptors);
//		Command cmd = getCreateViewCommand(request);
//		if (cmd != null && cmd.canExecute()) {
//			SetViewMutabilityCommand.makeMutable(
//					new EObjectAdapter(host().getNotationView())).execute();
//			executeCommand(cmd);
//			@SuppressWarnings("unchecked")
//			List<IAdaptable> nl = (List<IAdaptable>) request.getNewObject();
//			createdViews.addAll(nl);
//		}
//		if (changed || createdViews.size() > 0) {
//			postProcessRefreshSemantic(createdViews);
//		}
//		if (createdViews.size() > 1) {
//			// perform a layout of the container
//			DeferredLayoutCommand layoutCmd = new DeferredLayoutCommand(host()
//					.getEditingDomain(), createdViews, host());
//			executeCommand(new ICommandProxy(layoutCmd));
//		}
//
//		makeViewsImmutable(createdViews);
	}
}
